钢-铜管感应钎焊工艺技术研究

研究旨在解决钢-铜管感应钎焊的关键技术问题，通过感应钎焊现场调查确定其主要问题有：感应器与工件相对左、右偏斜，相对前倾、后仰，感应器与工件贴边。以钎料填缝深度作为衡量焊接质量的指标，正交试验结果表明，在所选参数范围内，填缝深度随装配间隙的增大而减小，填缝深度随感应器与工件相对偏角的增大而减小，填缝深度随功率的增加呈先增加后持平的趋势；单因素试验结果表明，感应器与工件贴边对钎焊质量有不良影响，工件放置角度对钎焊质量几乎无影响，最佳工艺参数为：环下6 mm焊接位置+0.06～0.16 mm双边间隙+86%功率，3～4 s焊接时间 + 左右、前后0～4°偏角相对位置。

Induction brazing technology of steel-copper pipe

The aim of this research was to solve the key technical problem in induction brazing of steel-copper pipe. Through the induction brazing field investigation, the main problems included that the inductor and the workpiece are relative to the left and right oblique, relative forward or backward oblique, workpiece nearby one side of inductor. Taking the filling depth as a measure of brazing quality, the orthogonal experiment result shows that the filling depth decreases while assembly clearance increases, the filling depth decreases while the relative angle of inductor and the workpiece increases, and when power is increased, the filling depth will increase first, and then become to be stable. Single factor experiment result shows that workpiece nearby one side of inductor has the adverse effects on brazing quality, placement angle of workpiece has little effect on brazing quality. The optimal process parameters as 6 mm below the ring position + 0.06～0.16 mm bilateral assembly clearance + 86% power, 3～4 s brazing time + 0～4 degrees angle of relative position for left and right, forward and backward.